Metals which are precipitated by sulphuretted hydrogen, as sulphides from a solution of their salts, even in the presence of free acid:
The precipitate is soluble in ammonium sulphide:
| Platinum (dark brown) | Antimony (orange) | |||
| Gold (dark brown) | Arsenic (yellow) | |||
| Tin (yellow and brown) |
The precipitate is insoluble in ammonium sulphide:
| Copper (black) | Mercury (black) | |||
| Silver (black) | Lead (black) | |||
| Cadmium (yellow) |
Metals which are precipitated by ammonium sulphide from neutral solutions, but not precipitated from acid solutions by sulphuretted hydrogen:
The sulphide precipitated is soluble in hydrochloric acid:
| Zinc (white) | Manganese (rose colour) | Iron (black) |
The sulphide precipitated is not soluble in dilute hydrochloric acid:
| Nickel (black) | Cobalt (black) |